We’d pay good money to spend an extra couple of hours, er, investigating Batman: Arkham City’s interpretation of Harley Quinn. As such, we’re pretty excited to learn that developer Rocksteady has more DLC on the cards.

While the content has yet to be confirmed by publisher Warner Bros, trophies for the pack have leaked online, offering some teases at what we can expect from the story expansion.

It appears side-kick Robin will take the lead role, as he mounts an assault on the bizarrely sexy Harley Quinn. There'll be new balloons to pop, in addition to, we presume, plenty of thugs to dispatch.

This will be the fourth major Batman: Arkham City DLC pack, following the Catwoman, Robin and Nightwing expansions late last year.

[source ps3trophies.org]